I'd like to publish serious critical pieces on classic works of fiction and nonfiction. Many excellent magazines offer in-depth reviews of recent publications, but it's more rare to find critical reviews of older literature (classics, medieval and renaissance, enlightenment and romantic, and so on) outside of academic journals. I have in mind the somewhat arbitrary and nonetheless flexible cut-off date of 1900.
Of course, I'd be working with a graphic/web designer (my own rather bare bones site is a testament to my lack of graphic design skills) while I handle the editorial duties.
Anyway, just a new idea I'm excited about - more to come.